BOBCAT > Excavators > 400s > 428 > A9K311001 & Above, A9K411001 & Above, AACJ11001 & Above > Undercarriage

Undercarriage Track Tensioner (W/O Replaceable Shaft) (S/N AACJ11223 & Below, A9K311309 & Below, A9K411308 & Below) Track Tensioner (W/Replaceable Shaft) (S/N AACJ11224 & Above, A9K311310 & Above, A9K411309 & Above) Front Idler (W/ Holes in idler) Front Idler (W/O Holes In Idler) Track Roller (Nut Mounted) (S/N AACJ11001 - AACJ13005, A9K311001 - A9K313003, & A9K411001 - A9K413005) Track Roller (Bolt Mounted) (S/N AACJ13006 & Above, A9K313004 & Above, A9K413006 & Above)